<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片式图 -->
    <el-card>
      <!-- 添加角色按钮区 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <el-table :data="rolelist" border stripe>
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row v-for="(item1,i1) in scope.row.children" :key="item1.id" :class="['bdbottom',i1===0?'bdtop':'','vcenter']">

              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">
                  {{item1.authName}}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>

              <!-- 渲染二级权限和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row v-for="(item2,i2) in item1.children" :key="item2.id" :class="[item2.id===0?'':'bdtop','vcenter']">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">
                      {{item2.authName}}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag v-for="(item3,i3) in item2.children" :key="item3.id" type="warning" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>

            </el-row>

          </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showGetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>

    </el-card>
    <!-- 分配权限对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist " :props="treeProps" show-checkbox node-key="id" default-expand-all
        :default-checked-keys="defkeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

  </div>
</template>

<script>
  export default {
    data() {
      return {
        //所有角色列表数据
        rolelist: [],
        //控制分配权限对话框的展示与否布尔值
        setRightDialogVisible: false,
        //用来存放所有权限的数据
        rightslist: [],
        // 树形控件的属性绑定对象
        treeProps: {
          label: 'authName',
          children: 'children'
        },
        defkeys: [],
        //当前即将分配权限的角色id
        roleId: ''
      }
    },
    created() {
      this.getRolesList()
    },
    methods: {
      async getRolesList() {
        //获取所有角色的列表
        const {
          data: res
        } = await this.$http.get('roles')

        if (res.meta.status !== 200) {
          return this.$message.error('获取角色列表失败')
        }
        this.rolelist = res.data
        // console.log(this.rolelist)
      },
      //根据id删除对应的权限
      async removeRightById(role, rightId) {
        //弹出(MessageBox)提示用户是否删除权限
        const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        if (confirmResult !== 'confirm') {
          return this.$message.info('您已取消删除')
        }
        // console.log('确认删除')
        const {
          data: res
        } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败了')
        }
        // this.getRolesList()
        role.children = res.data
      },
      //展示分配权限的对话框
      async showGetRightDialog(role) {
        this.roleId = role.id
        // console.log(this.roleId)
        console.log(role)
        //获取所有权限数据
        const {
          data: res
        } = await this.$http.get('rights/tree')
        if (res.meta.status !== 200) {
          return this.$message.error('获取权限列表失败')
        }
        //获取到的权限数据保存到私有数据中
        this.rightslist = res.data
        // console.log('获取权限数据成功了')
        // console.log(this.rightslist)
        this.getleafkeys(role, this.defkeys)
        this.setRightDialogVisible = true
      },
      //通过递归的形式获取角色下所有三级权限的id，并保存到数组中
      getleafkeys(node, arr) {
        // 如果节点node中不包含children则说明他是三级节点，那我
        // 们就把节点id追加到arr中
        if (!node.children) {
          return arr.push(node.id)
        }
        //如果没有return，证明他还不是三级节点，我们就要通过调用递归进一步获取三级节点
        node.children.forEach(item => this.getleafkeys(item, arr))

      },
      //对话框关闭事件
      setRightDialogClosed() {
        this.defkeys = []
      },
      //点击为角色分配权限
      async allotRights() {
        //首先拿到所有半选和全选状态的key，再次之前要拿到树标签的引用
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        // console.log(keys)

        // 转变为以逗号拼接的字符串
        const idStr = keys.join(',')

        console.log(idStr)
        const {
          data: res
        } = await this.$http.post(`roles/${this.roleId}/rights`, {
          rids: idStr
        })

        if (res.meta.status!==200) {
            return this.$message.error('失败了')
        }
        this.$message.success('分配权限成功')
        this.getRolesList()
        this.setRightDialogVisible = false
      }
    }
  }
</script>

<style lang="less" scoped>
  .el-tag {
    margin: 8px;
  }

  .bdbottom {
    border-bottom: 1px solid #eee;
  }

  .bdtop {
    border-top: 1px solid #eee;
  }

  .vcenter {
    display: flex;
    align-items: center;
  }
</style>
